Khudoga (PIN collection 2363) (Jurassic of Russian Federation)

Where: Buryatia, Russian Federation (50.8° N, 105.5° E: paleocoordinates 54.9° N, 106.2° E)

• coordinate based on nearby landmark

• outcrop-level geographic resolution

When: Ichetuy Formation, Oxfordian (163.5 - 157.3 Ma)

• Insect workers often assign a late Early Jurassic-early Middle Jurassic (or Toarcian-Aalenian) age but radiometric dating of Ichituy Fm volcanics gives ages of 159-156 Ma.

• group of beds-level stratigraphic resolution

Environment/lithology: terrestrial; lithology not reported

• Transbaikal rift.

Size classes: macrofossils, mesofossils

Preservation: mold/impression

Reposited in the PIN

Primary reference: L. V. Arnoldi, V. V. Zherikhin, L. M. Nikritin and A. G. Ponomarenko. 1977. Mezozoiskie zhestkokryiye. Akademiya Nauk SSSR, Trudy Paleontologicheskogo Instituta 161:1-204 [M. Clapham/M. Clapham/M. Clapham]more details

Purpose of describing collection: taxonomic analysis

PaleoDB collection 123147: authorized by Matthew Clapham, entered by Matthew Clapham on 12.01.2012, edited by Jered Karr

Creative Commons license: CC BY (attribution)

Taxonomic list

Show authors, comments, and common names
Insecta
 Diptera - Chaoboridae
? Hypsocorethra sp.1
? Hypsocorethra sp.1 Kalugina 1985 phantom midge
PIN 2363/10
 Plecoptera - Siberioperlidae
Siberioperla lacunosa2
Siberioperla lacunosa2 Sinitshenkova 1983 stonefly
PIN 2363/1-7
 Coleoptera - Coptoclavidae
Stygeonectes jurassicus, "Necronectes aquaticus" = Timarchopsis aquaticus
Stygeonectes jurassicus Ponomarenko 1977 beetle
larvae
"Necronectes aquaticus" = Timarchopsis aquaticus Ponomarenko 1977 beetle
PIN 2363/15, 17
 Ephemeroptera - Siphlonuridae
Mesobaetis aff. sibirica3
Mesobaetis aff. sibirica3 Brauer et al. 1889 mayfly
PIN 2363/18,19
1Kalugina 1985; 2Sinitshenkova 1983; 3Sinitshenkova 1985